Electrical condenser



2 Sheets-Sheet l IZVENTOR March 1l, 1930. H. R. VAN DEVENTER ELECTRICALCONDENSER Filed Feb. 14, 1924 March 11, 11930a H. R. VAN DEVENTER M7503@ELECTRICAL CONDENSER Filed Feb, 14, 1924 2 Sheets-Sheet 2 Patented Mar.11, 1930V UNITED STATES PArE-Nr OFFICE HARRY R. VAN DEVENTER, OF NEW`YORK, N. Y., ASSIGNOR TO DUBILIER CONDENSER CORPORATION, OF NEW YORK,N. Y., A CORPORATION F DELAWARE ELECTRICAL CONDENSER Application filedFebruary 14, 1924. Serial No. 692,785.

'Ihis invention relates to condensers; especially condensers forelectrical circuits.

An object of my invention is to provide a condenser that is of simple,inexpensive and durable construction, and capable of easy connection tothe circuit of which it is to form a part.

Further objects and advantages will appear from the followingdescription and drawings, but the disclosure is explanatory only, and Imay make such changes in the shape, size and arrangement of parts as liewithin the nature and scope of the invention.

On the drawings,

Figure 1 is a perspective view of a con denser, according t0 myinvention;

Figure 2 is a diagram to illustrate the interior construction thereof;

Figures 3 and 4 are respectively a top and an end view of another formof condenser according to my invention;

Figure 5 is aside view of a further modiication;

Figures 6, 7and 8 are respectively a top, an end and a. side view ofanother form of condenser according to my invention; and

Figures 9 and 10 are respectively top and end views of still anothermodification.

The same numerals identify the same parts throughout.

Referring first to Figures 1 and 2, I show a condenser having a baseplate 1 of bakelite, or other insulating material, upon which is aso-called stack 2, madeup of a number of sheets of conductive materialseparated from one another by a suitable dielectric.- The manner inwhich the sheets are arranged is indicated diagrammaticall;r in Figure2, wherein 3 denotes a sheet of conductive material, such as tin-foil,to be disposed longitudinally of the condenser, and 4, a similar sheetarranged transversely of the rst sheet,

so as to extend across one end of the first 45, sheet, with the endsofthe sheet 4 projecting beyond the sides of the sheet 3, and the sheet3 projecting a material distance beyond one side of the sheet 4. Betweenthe two sheets is a sheet of insulating or dielectric material,

such as mica 5. As many of the sheets 3, 4

and 5 as are needed are employed and the top and bottom sheets of thestack 2 will, of course, be of mica or the like, so that all of thesheets of foil are properly insulated, covered and protected. The micasheets are about as wide and as long as the plate 1, and

a little wider than the sheets 3, and the ends of the sheets 4 projectbeyond the sides ofthe mica sheets 5 also. At one end of the condenserthe sheets of mica will project a little beyond the sheets of foil 3 and4, while at the opposite end, the extremities of the longil tudinalsheets of foil 3 will project beyond the mica, so' that theseextremities of the sheets 3 can be brought into contact\, with 65 oneanother and with a terminal, so as to enable the condenser to beconnected in the circuit of which itis to form a part. These ends of thesheets of foil 3 can be engaged by an-element in the form of a clip 6,which is attached to the adjacent end of the condenser so as to grip thestack 2, and the base plate 1 Jfrom one side to the other. Theprojecting ends of the foils 3 can be bent against the end of thecondenser and over upon either the base plate 1, or the top of the stack2, so

as to be in contact with the clip 6; and as this clip is to bepreferably of metal, it will serve as a terminal, and a conductor joinedthereto will unite all of the foils 3, of one polarity, into circuit.

I also employ a pair ofclips 7 attached to the opposite sides of thecondenser and extending along said sides to the end thereof, oppositethe end carrying the clip 6. All of the clips 6 and 7 are U-shaped,having parallel arms or portions 8, with connecting parts 9. Hence, thebody of the condenser, consisting of the base plate 1 and stack 2 canbermly gripped by these clips, so that thestack 2 is 90' clampedsecurely against the base plate 1,l and the clips serve as securingmeans for holding the base and stack firmly together. The rojectingextremities of the cross foils 4 can e laid against the opposite sidesof the condenser and folded down against either the top of the stack 2,or the lower face of the ibase.plate 1, so that when the clips 7 are"attached, these clips, which are likewise preferably of metal, will bothmake contact with either vof the side clips 7, which are, theremeans,such as a clip 17 Both the clip andv fore, adapted to serve as terminalsof the foils 4, which are of opposite polarity with respect to the foils3, these foils 4 can be connected in circuit. I may provide the endclips 6 with lugs 10, having apertures 11; also with lugs 12; the lugs10 extending from the arms 8 1n opposite directions at the topand'bottom faces of the condenser, and like- Wise with the lugs 12. Inother words, at each side of the condenser where the end clip 6 isplaced, there will be a lug 10 and a lug 12,

but at one side the perforated lug 10 will be uppermost while on theopposite side these lugs will be reversed, and the lug 12 will beuppermost. Each of the side clips also has a lug 10 and a lug 12 formedby cutting or stamping the metal of the Aparts 9 of these clips; thelug'lO of each side clip leaving a cut-away space 13, when it is bentoutwfard, and the lug 12 a cut-away space 14. These lugs 10 and 12 ofthe side clips are shown as so arranged that the lugs 10 are locatedadjacent the base plate 1; while the lugs 12 are located adjacent thetop of the stack 2. But the lugs 10 are not in transverse alinement andneither are the lugs 12; for example, the lug 10 of one side clip isnear to the adjacent extremity of the condenser than the other; and sowith the lugs 12. The placing of these lugs 10 and 12 as shown in Figurel is simply for convenience in mounting the condenser and attachingconductors to same. The clamps 6 and 7 provide means for engaging andcompressin the edges of the condenser over substantially the wholeextent of the periphery of the condenser, to hold the sheets ofconductive material and insulation together. Thus the clip 6 grips bothfaces of the condenser along the end shown as the right end thereof inFigure 1, and the two clips 7 grip the two faces of the condenser alongthe edges at the opposite sides thereof and at the left end as well,because these two clips extend towards each other; and the spacesbetween the two clips 7, and between these clips and the clip 6, arerelatively small.

Figures 3 and 4 show another form of condenser, comprising a base plate1, a'stack of condenser elements 2, and a cover plate 15 ofinsulation'on the top of 'fthe'stack 2. Une end of the base plate hasan. extension 16 and part of the sheets of foil, such as the foils 3,will project out over this extension 16 and be secured4 against same bysuitable the extension will be perforated to receivean eyelet rivet 18,to hold the clip tightly against the extension. Along the sides of thebase plate 1 and cover plate 15, will be clips 7 and one of these clipswill have a perforatedflug 10', extending out beyond the end of .the`

condenser, opposite the end bearing the element 17.

As in the case of the condenser shown in Figure 1, the extremities ofthe foils 4 will be directly engaged by the side clips 7. The projectingends of the foils 3 may be long enough to be pierced by the rivet 1 8,or shorter so as to be simply held by the clip 17 against extension 16.

Figure 5 shows a type of condenser similar to that of Figures 3 and 4,except that the base plate 1 has no extension 16, and I employ aterminal element or plate 19 of some conducting material, which has theshape indicated in Figure 6. As illustrated`the plate 19 may lie on thebase plate 1, with the ends .and be in Contact with the plate 19, or theextremities of all these sheets of foil 3 may project out and be securedupon the extended end 20 of this terminal plate 19 in the same way asthey are secured to the extension 16 in the condenser shown in Figure 3.To bring the projecting ends of the sheets of foil against the extension20 of the plate 19, and secure them permanently to this extension and inelectrical contact therewith, I may employ a clip such as the clip 17,with a rivet 18, as in Figure 3; or any other suitable means, such asmerely an eyelet rivet 18 to pass through v,the

ends of the foils, and an aperture 21 in the extheir ends projectingfrom the sides o f the stack to be engaged as above described by theside clips 7, which as in the case of the condenser shown in Figures 3and 4, will include a perforated lug 10 carried by one of these clips,and-projecting beyond the opposite end of the condenser, to enable aterminal to be attached thereto. This lug 10 and extension 20 besidesenabling the condenser to be connected in circuit, may also serve asconvenient means to enable the condenser to be mounted upon a support.Figure 5 is shown as if broken away at one end, to present the ends ofthe foils 3 in contact with the plate 19.

In the condenser shown in Figures 6, 7 and 8, I employ a base plate 1and a cover plate 15 with a 'stack 2 between them, and a terminal plate19, having one end 20projecting out, as in the case of the condensershown in Figure 5. But I replace the clips 7 with a band clamp 22, whichextends around the condenser and has its end 23 turned down against thecover plate 15. This clamp is provided with a perforated lug 24,extending from one side thereof inline with the perforated extension 20of the lterminal plate 19. The sheets of foil 3 will be'united at theirends to the terminal plate 19, and the remaining foils 4 will project atthe opposite sides .of the condenser, to be enga-ged by the clamp 22.The condenser in Figure 6 1s shown as 1f broken away along one side toillustrate the plate 19. v

In Figures 9 and 10, I illustrate acondenser site sides of the condenservtowards the other of thesame construction as thatshownin Figures 6, 7and 8, except that in this form the ends 23 of the clamp 22, meet eachother,

and one end of the clamp is provided with projections 25, which arereceived into correspondingly shaped recesses 26, inthe other end, sothat the whole of the body of the condenser is encircled by the clampand the projections 25 and recesses 26 will cause the ends of the clampto interlock and thus aiord uniform pressure of the clamp against theplates l and 15 over their whole area. Y

Having described my invention, what I believe to be new and desire tosecure and protect by Letters Patent of the United States l. A condensercomprising a base plate, sheets of conductive material separated by adielectric, one of said Asheets extending across the end of another,lsaid other sheet projecting a material distance beyond one side of therst sheet, said first sheet having one or both its extremitiesprojecting beyond the adjacent side edge or edges of said other' sheet,a clip extending across one end of the condenser and engaging the baselate and the adjacent extremity of said ot er sheet, and separate clipsextending along the oppo-v end, said last named clips engaging the baseplate and the ends of the first sheet, whereby the said sheets and saidbase irmly together. Y y

2. A condenser comprising a base plate,

lsheets of conductive material separated by a dielectric, one of saidsheets extending across the end of another, said other sheet projectinga material distance beyond one sidelof the first sheet, said first sheethaving one or both its extremities projectingbeyond the adjacent sideedge or edges of said other sheet, a clip extending across one end ofthe condenser and engaging the base plate and the adjacent extremity ofsaid othersheet, and-separate clips extending along the opposite sidesof the condenser towards the other end, said last named clips engagingthe base plate andthe ends of the rst sheet, whereby the said sheets andsaid base plate are held firmly together, the clip at the end of thecondenser having lugs projecting therefrom at opposite sides of thecondenser, and the clips at the sides having sides of the condenser.'

In testimony whereof I aiiix 1n signature.

' HARRY R. VAN DE NTER.

-lugs cut therefrom to project at the opposite plate are held

